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Message-ID: <e13597370702150417o3888b71dtcc42e38156b46918@mail.gmail.com> Date: Thu, 15 Feb 2007 15:17:23 +0300 From: "Eugene Ilkov" <e.ilkov@...il.com> To: "Pierre Ossman" <drzeus-list@...eus.cx> Cc: linux-kernel@...r.kernel.org Subject: Re: 2.6.20 mmc: problem with highspeed SD card On 2/15/07, Pierre Ossman <drzeus-list@...eus.cx> wrote: > Eugene Ilkov wrote: > > I have I/O errors with Transcend SD highspeed card 2GB/150x when it's > > mounted in r/w mode (cardreader on sharp sl-c1000) > > It works well if I reverse mmcv4 patch commited to 2.6.19-git2 > > (http://lkml.org/lkml/2006/10/4/27) > > That patch is not the same as you are referencing in the rest of your mail. I geuss changes was started from that patch, I mean changes that comes with that: http://www.linuxhq.com/kernel/v2.6/19-git2/drivers/mmc/mmc.c I found another related patch http://mailman.laptop.org/pipermail/commits-kernel/2007-January/000554.html so i guess i'm not alone > > > I'm not experienced in mmc, but I figured out that problem is > > somewhere in mmc_read_switch_caps() and when i change cmd.arg value > > from 0x80FFFFF1 to 0x00FFFFF1 it works fine too > > What argument should have SD_SWITCH opcode? > > > > The argument is correct, so I'm guessing that your controller might be a bit > flaky and not handle the new timing. > Can you enable MMC_DEBUG and send over the > dmesg? mmc debug output is too noisy and i can give you only this: mmc0: starting CMD18 arg 30007e00 flags 00000035 PXAMCI: irq 00000004 stat 00002140 PXAMCI: irq 00000005 stat 00002940 PXAMCI: irq 00000007 stat 00003940 mmc0: req done (CMD18): 0/0/0: 00000900 5f5a83d5 2db7ffbf 96800012 mmc0: starting CMD18 arg 0000ae00 flags 00000035 PXAMCI: irq 00000004 stat 00002140 PXAMCI: irq 00000005 stat 00002940 PXAMCI: irq 00000007 stat 00003940 mmc0: req done (CMD18): 0/0/0: 00000900 5f5a83d5 2db7ffbf 96800012 mmc0: starting CMD18 arg 0ab49e00 flags 00000035 PXAMCI: irq 00000004 stat 00002140 PXAMCI: irq 00000005 stat 00002940 PXAMCI: irq 00000007 stat 00003940 mmc0: req done (CMD18): 0/0/0: 00000900 5f5a83d5 2db7ffbf 96800012 mmc0: starting CMD18 arg 0ab4ae00 flags 00000035 PXAMCI: irq 00000004 stat 00002140 PXAMCI: irq 00000005 stat 00002940 PXAMCI: irq 00000007 stat 00003940 mmc0: req done (CMD18): 0/0/0: 00000900 5f5a83d5 2db7ffbf 96800012 with desabled mmc debug : Linux version 2.6.20-rc1-mm1-z2 (root@fly) (gcc version 4.1.1 (Gentoo 4.1.1-r3)) #58 PREEMPT Thu Feb 15 13:49:39 MSK 2007 CPU: XScale-PXA270 [69054117] revision 7 (ARMv5TE), cr=0000397f Machine: SHARP Akita [..skipped..] mmcblk0: mmc0:b368 SDC 2009600KiB mmcblk0: p1 mmcblk0: error 2 transferring data mmcblk0: error 2 transferring data kjournald starting. Commit interval 5 seconds mmcblk0: error 2 transferring data EXT3 FS on mmcblk0p1, internal journal EXT3-fs: recovery complete. mmcblk0: error 2 transferring data EXT3-fs: mounted filesystem with ordered data mode. VFS: Mounted root (ext3 filesystem). Freeing init memory: 72K mmcblk0: error 2 transferring data mmcblk0: error 2 transferring data mmcblk0: error 2 transferring data mmcblk0: error 2 transferring data mmcblk0: error 2 transferring data mmcblk0: error 2 transferring data mmcblk0: error 2 transferring data i boot into root fs on SD, and it just hangs on remounting to rw, so it's not easy to get full dmesg output with i/o error and mmc debug info, but i'll try if it helps - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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